A Quantitative Study to Evaluate the Performance of the Semantic Cache Management Methods

The diversity and the heterogeneity of distributed systems make the setting up of a mediation system an indispensable necessity. To reduce the time of answering the clients' queries, it is necessary to design a device destined to maintain the results of these queries in a memory for a posterior use in a semantic cache. For the purpose of a good management of the cache, this paper proposes a comparative study between two methods of semantic cache design and organization, namely the one region and multi-region. To improve the query performance we have developed a semantic cache system on AXMed mediator, which applies innovative query analysis and rewriting technique to answer the client' queries using one region method, Extensive experimental results on the size of memory and time response illustrate the performance improvement achieved by one region over the multi-region method for a variety of situations